Computer System
Why J.A.R.V.I.S is a Computer
J.A.R.V.I.S
Jarvis is a computer system designed by Tony Stark. He assist Tony in his daily life and when he's saving the world. It inputs the information from various data bases, and outputs the information to Tony.
How he is useful
Jarvis provides tons of information. He can calculate the force your about to land at, send emails, call people, and work as a security system, he sounds like a glorified butler but that's essentially what he is.